Age and growth correlation of Leuciscus chuanchicus
In order to analyze the age and growth of Leuciscus chuanchicus,271 samples were caught in the sections of Gansu and Ningxia of the main stream of the Yellow River in July-August 2022 and March 2023.The von Bertalanffy Growth Equation(VBGF),Logistic GF,Gompertz growth equation(Gompertz GF)and Power exponential growth equation(Power exponential GF)were used to simulate the growth of L.chuanchicus.Model parameters were calculated by the maximum likelihood method,the most suitable model was selected by the Akaike information criterion(AIC).The results showed that the samples of L.chuanchicus were divided into five age groups,of which 3 years old group had the largest sample size,accounting for 46.13%,and there was no significant difference in growth between male and female individuals.The von Bertalanffy growth equation was the optimal growth equation for L.chuanchicus,followed by the Gompertz,Logistic GF growth equations.The VBGF growth equation for L.chuanchicus was:Lt=46.992×[1-e-0.274×(ti-0.333)].The age of the inflection point in the growth acceleration curve was 4.626 years,and the corresponding total length and body weight were 32.50 cm and 318.80 g respectively.
万方数据
维普
